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No. 622,308. I Patented Apr. 4, I899.

- H. WINKEL.

PUMP.

(Application filed Dec. 91, 1697.) (No Model.) 3 Sheets-Sheet I.

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i 7 Zeu L'c/L Wink-6L Patented Apr. 4, I899.

H. WINKEL.

P U M P (Apizlication filed. Dec. 21, 1897.)

3 Sheets-Sheet 2.

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No. 622,308. Patented Apr. 4, I899.

H. WINKEL.

PUMP.

(Application filed Dec. 21, 1897.) (No Model.) 3 Shani-Sheet 3.

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NITED STATES PATENT Fries.

- HEINRICH WINKEL, OF MOSCOW, RUSSIA.

PUMP.

SPECIFICATION forming part of Letters Patent No.. 622,308, dated April4, 1899.

Application filed December 21, 1897. Serial No. 662,855. (No model.)

To a whom it may concern.-

Be it known that I, HEINRICH I/VINKEL, of Moscow, Russia, have inventedcertain new and useful Improvements in' Pumps, (for which Letters Patenthave been obtained in Germany, No. 93,127, dated April 29, 1896; inAustria, No. 47/2,227, dated June 12, 1897; in Hungary, No. 8,655, datedFebruary 5, 1897; in Belgium,No. 126,162, dated February 5, 1897; inFrance, No. 263,758,. dated February 5,1897; in Great Britain, No.3,122,- dated February 5, 1897, and in Russia, No. 794, dated November28, 1896;) and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying draw ings, and to letters ofreference marked thereon, which form a part of this specification.

Pumps according to this invention are primarily designed for use asArtesian-well pumps and pit-pumps and are characterized by the fact thata double delivering action is produced by means of two coaxial pistonsplaced on a single rod. Each piston works in its respective cylinder,and the rod connecting the two pistons extends through a fixedpartition-wall which closes the lower end of the upper pump-cylinder.The lower piston delivers during its downward stroke, and the connectionwith the upper part of the pump is effected either by means of a hollowrod connecting the two pistons or by means of passages which surroundthe lower pumpcylinder. The lower pump-piston may be constructed eitheras a valve-piston or as a disk piston, a suction-pipe with suction-valvebeing in the latter case'connected to the pump, cylinder.

Figure 1 of the accompanying drawings illustrates in longitudinalsection an arrangement of pump according to this invention speciallyadapted for use as an Artesian-well pump. In this case the upperpump-cylinder a is closed at its bottom by a partition-wall b, belowwhich the lower pump-cylinder dis arranged. The upper pump-cylinder a isconnected directly with the delivery-pipef. The upper pump-piston g isconnected with the lower pump-piston h by means of a pipe t', whichopens at its lower end into the lower pump-cylinder d, (which is closedat the bottom,) and is provided below the upper piston g with holes, asshown. Both the pistons g and h are constructed as valve-pistons; butthe valves m of the upper piston open upward, whereas those, at, of thelower piston open downward. must dip into the liquid to be pumped tosuch extent that the holes is, provided in the upper end of the lowercylinder d, will be'immersed. When both pistons are moved downward bymeans of the pump-rod Z, the valves n of the lower piston it close, andthe liquid in the cylinder d is forced through the connectingpipe '5 andthe open valves m of the upper piston into the delivery-pipe f. Thus thelower part of the pump acts as a force-pump. In the upward movement ofthe two pistons g and h the valves m of the upper piston close, and theupper part of the pump works with a forcing action, while liquid flowsthrough the open valves 1?, of the lower pis ton h and the apertures kof the lower cylinder 01 into the cylinder 61 and passes into the uppercylinder through the connectingpipe 2'. To enable the two pistons to beremoved from the pump, the partition-wall b is detachable, beingpreferably screw-threaded, so that it can be unscrewed. This is effectedby means of projections 0 on the lower surface of the upper piston .g,to which correspond projections r on the upper surface of the partitionI), the arrangement being such that when the two pistons are in theirlowest position the partition-wallb can be unscrewed by turning thepump-rod l and both pistons lifted out, together with thepartition-wall, by means of the said pump-rod. In a similar manner afterall the parts have been inserted into the pump-cylinders thepartition-wall b can be screwed in again by means of the upper piston g.

Fig. 2 is a longitudinal section illustrating a modified construction inwhich the lower piston his formed as a disk piston, and to the lowerpump-cylinder d there is attached a suction-pipe 19, provided with asuction-valve s. The openings in the upper part of the lowerpump-cylinder d serve in this case simply for the inlet of air. In thismodification the upper side of the disk piston h is provided withprojections 0 for the purpose of In order to deliver, the pump enablingthe partition-wall I) to be unscrewed by means of projections r on theunder surface of the same. The valve-seat of the suction-valve s isprovided with an upper bridgepiece having a screw-pin 15, adapted to fitan internally-screw-threaded part 15, carried by the under surface ofthe lower piston h, so that the valve-seat of the suction-valve s can,when required, be taken out also by means of the lower piston h.

Fig. 3 shows in longitudinal section a modification of the pump firsthereinbefore described, and Figs. 4: to 7 are sections according to thelines 1 1, 2 2, 3 3, and 4 4 of Fig. 3. In this case the connection ofthe two pistons g and h is effected by means of a solid rod 11. Thelower pump-cylinder d is surrounded by a number of passages u, by meansof which the lower part of this pump-cylinder d, which is closed at thebottom, is connected with the lower part of the upper pump-cylinder a.The

- partition-wall b is in this case unscrewed by means of a piece 0' ofsquare cross-section, which is provided 011 the rod z" and which fitsinto a corresponding recess a" in the wall b.

Figs. 8 to 10, inclusive, show another construction of pump according tothis invention consisting of a modification of the pump shown in Fig. 2.In this arrangement the lower part of the lower pump-cylinder d isconnected by passages u, surrounding the latter, with the lower part ofthe upper pumpcylinder, and the two pistons g and h are connected by asolid rod 6. This construction will be clear without furtherdescription.

The last two modifications have the advantage over the ones firstdescribed that in conserving a cylindrical outer form and a concentricposition of all parts of the pump the dimensions and proportions can beso selected that the upstroke and the downstroke of the pistons willmove forward equal quantities of liquid.

- The two pumps shown in Figs. 1 and 2, have, however, the advantagethat when they are employed as Artesianwell pumps or tubewell pumps theyallow of making use of the greatest possible free area of the wall;

I claim as my invention the following-de-. fined novel featuressubstantially as hereinbefore specified, namely:

1. A double-acting pump comprising two coaxial cylinders a and cl, and afixed partition I) separating them, combined with pistons g and hworking in said respective cylinders, a piston-rod connected to bothpistons for operating them simultaneously, an inletvalve admitting fluidto the lower cylinder beneath its piston, an outlet-valve carried by theupper piston, a fluid-passage communicating from beneath the lowerpiston to the upper cylinder beneath the upper piston, and saidpartition I) fitted detachably to said cylinders, with coactingshoulders carried by the pistons and formed on said partitionrespectively by means of which the partition can be displaced and beremoved with the pistons.

2. A double-acting pump comprising two coaxial cylinders a and d, and afixed partition b separating them, said partition screwthreaded engaginga threaded socket between said cylinders, and having projections a 0',combined with pistons g and h working in said respective cylinders, apiston-rod connected to both pistons for operating themsimultaneously,an inlet-Valve admitting fluid to the lower cylinderbeneath its piston, an outlet-valve carried by the upper piston, afluid-passage communicating from beneath the lower piston to the uppercylinder bcneath the upper piston, and projections o 0 on one of saidpistons adapted to engage said projections r r to unscrew the partitionZ).

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

HEINRICH YVINKEL.

Vitnesses:

H. M ENGEL, P. KRAUDER.

